Light and Shadows Quiz

Grade 2 · Science · Quiz

Test your knowledge of light, shadows, and how light interacts with different materials!

Questions

What is the main source of natural light on Earth?
1. The Moon
2. Stars
3. The Sun
4. Lamps
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Answer: The Sun
The Sun is Earth's primary natural light source, providing the light and heat that support all life on Earth.
An opaque object lets light pass through it easily.
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Answer: False
Opaque objects BLOCK light completely — that is why they cast shadows. Transparent objects let light through.
When light bounces off a surface, it is called ___.
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Answer: reflection
Reflection occurs when light bounces off a surface. Mirrors are excellent reflectors of light.
Which material is TRANSPARENT?
1. A brick wall
2. A book
3. Clear glass
4. A wood plank
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Answer: Clear glass
Clear glass is transparent because light passes through it without being blocked or scattered.
Shadows form on the same side of an object as the light source.
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Answer: False
Shadows form on the OPPOSITE side of an object from the light source — light is blocked going forward.
Frosted glass that lets some light through but not clearly is called ___.
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Answer: translucent
Translucent materials allow some light to pass through but scatter it, so you cannot see clearly through them.
Why are shadows longer in the morning than at noon?
1. The Sun is closer in the morning
2. The Sun is lower in the sky in the morning
3. Morning shadows have more energy
4. Shadows grow throughout the day
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Answer: The Sun is lower in the sky in the morning
When the Sun is at a low angle, shadows stretch out long. At noon the Sun is overhead and shadows are short.
Light travels in straight lines.
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Answer: True
Light always travels in straight lines, which is why shadows have well-defined edges.
What happens to light when it hits an opaque object?
1. It passes through clearly
2. It is completely blocked
3. It speeds up
4. It turns into heat only
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Answer: It is completely blocked
Opaque objects do not let any light through — they absorb or reflect it, creating a shadow behind them.
A ___ forms when an opaque object blocks light.
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Answer: shadow
A shadow is the dark area created when an opaque object prevents light from reaching the surface behind it.

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